new(ci): run latest-kernel CI against arm64 too.

Signed-off-by: Federico Di Pierro <nierro92@gmail.com>

.github/workflows/latest-kernel.yml

@@ -12,8 +12,16 @@ on:
 
 jobs:
   build-latest-kernel:
-    name: build-latest-kernel
-    runs-on: ubuntu-latest
+    name: build-latest-kernel-${{ matrix.arch }}
+    outputs:
+      build_amd64: ${{ steps.build-amd64.outcome }}
+      build_arm64: ${{ steps.build-arm64.outcome }}
+      latest_vers: ${{ steps.latest-version-amd64.latest_vers }}
+    runs-on: ${{ (matrix.arch == 'arm64' && 'actuated-arm64-8cpu-16gb') || 'ubuntu-22.04' }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [amd64, arm64]
     container:
       image: falcosecurity/driverkit:latest
     steps:
@@ -23,14 +31,14 @@ jobs:
           git clone https://aur.archlinux.org/linux-mainline.git linux/
 
       - name: Generate driverkit config
-        id: latest-version
+        id: latest-version-${{ matrix.arch }}
         # Note: in case we are building latest mainline,
         # we grep the linux-mainline aur PKGBUILD "_tag" line, that is made like: "_tag=v6.4-rc1"
         # We then need to extract the part after the "=" and finally remove the starting "v".
         run: |
           cd linux/
           echo "kernelversion: 1" > dk.yaml
-          echo "architecture: amd64" >> dk.yaml
+          echo "architecture: ${{ matrix.arch }}" >> dk.yaml
           echo "driverversion: ${{ github.sha }}" >> dk.yaml
           echo "output:" >> dk.yaml
           echo "  module: mod.ko" >> dk.yaml
@@ -53,18 +61,22 @@ jobs:
           path: linux/dk.yaml
 
       - name: Test drivers build
-        id: build
+        id: build-${{ matrix.arch }}
         run: |
           echo "Testing build of drivers against: ${{ steps.latest-version.outputs.latest_vers }}"
           driverkit docker -c linux/dk.yaml -l debug
 
+  badge-latest-kernel:
+    if: always() && github.event_name == 'schedule'
+    runs-on: 'ubuntu-latest'
+    needs: 'build-latest-kernel'
+    steps:
       - name: Update README badge
         uses: schneegans/dynamic-badges-action@e9a478b16159b4d31420099ba146cdc50f134483 # v1.7.0
-        if: always() && github.event_name == 'schedule'
         with:
           auth: ${{ secrets.FEDEDP_GIST_SECRET }}
           gistID: 1cbc5d42edf8e3a02fb75e76625f1072
           filename: kernel.json
           label: Drivers build
-          message: ${{ steps.latest-version.outputs.latest_vers }}
-          color: ${{ steps.build.outcome != 'success' && 'red' || 'brightgreen' }}
+          message: ${{ needs.build-latest-kernel.latest_vers }}
+          color: ${{ (needs.build-latest-kernel.build_amd64 != 'success' || needs.build-latest-kernel.build_arm64 != 'success') && 'red' || 'brightgreen' }}